Approach for analyzing the ultimate strength of concrete filled steel tubular arch bridges with stiffening girder

作者：Zhang Zhi cheng; Xie Xu^*; Zhang He; Chen Heng zhi

来源：Journal of Zhejiang University-Science A(Applied Physics & Engineering), 2007, 8(5): 682-692.

DOI：10.1631/jzus.2007.A0682

• ultimate strength
• concrete filled steel tubular (CFST) arch bridge
• stiffening girder
• fiber model beam element
• construction process

A convenient approach is proposed for analyzing the ultimate load carrying capacity of concrete filled steel tubular (CFST) arch bridge with stiffening girders. A fiber model beam element is specially used to simulate the stiffening girder and CFST arch rib. The geometric nonlinearity, material nonlinearity, influence of the construction process and the contribution of prestressing reinforcement are all taken into consideration. The accuracy of this method is validated by comparing its results with experimental results. Finally, the ultimate strength of an abnormal CFST arch bridge with stiffening girders is investigated and the effect of construction method is discussed. It is concluded that the construction process has little effect on the ultimate strength of the bridge.

• 出版日期2007-4
• 单位浙江大学